:root {
  --blue-900: #08243A;
  --blue-700: #103E5C;
  --blue-400: #2C7099;
  --coral-500: #FF6A45;
  --coral-200: #FFC0AC;
  --snow: #F5F8FA;
  --red-600: #A32B26;
  --slate: #5C6E7B;
  --ink: #0C1116;
  --line: #C7D5DE;
  --ice: #E3EEF4;
  --container-max: 1240px;
  --wide-max: 1400px;
  --gutter: clamp(16px, 4vw, 48px);
  --header-h: 64px;
  --dur: 160ms;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding-top: var(--header-h);
  background: var(--snow);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: clamp(16px, 1.05vw, 18px);
  font-weight: 400;
  line-height: 1.75;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--coral-200);
  color: var(--blue-900);
}

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--coral-500);
  outline-offset: 2px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.6em;
  color: var(--ink);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 5rem);
  line-height: 1.02;
}

h2 {
  font-size: clamp(1.8rem, 3.8vw, 3.2rem);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  line-height: 1.2;
}

p {
  margin: 0 0 1.1em;
}

strong {
  font-weight: 900;
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1000;
  padding: 0.75rem 1rem;
  background: var(--coral-500);
  color: var(--blue-900);
  font-weight: 900;
  line-height: 1;
  transform: translateY(-160%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.container,
.container-wide {
  width: min(var(--container-max), calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
}

.container-wide {
  width: min(var(--wide-max), calc(100% - (var(--gutter) * 2)));
}

.container-narrow {
  width: min(68ch, calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
}

.section {
  position: relative;
  padding-block: clamp(48px, 8vw, 96px);
}

.section--tight {
  padding-block: clamp(32px, 5vw, 64px);
}

.section--blue {
  background: var(--blue-900);
  color: var(--snow);
}

.section--blue h1,
.section--blue h2,
.section--blue h3,
.section--blue h4,
.section--blue h5,
.section--blue h6 {
  color: var(--snow);
}

.section--ice {
  background-color: var(--ice);
  background-image:
    repeating-linear-gradient(0deg, transparent 0, transparent 31px, rgba(44, 112, 153, 0.08) 31px, rgba(44, 112, 153, 0.08) 32px),
    repeating-linear-gradient(90deg, transparent 0, transparent 31px, rgba(44, 112, 153, 0.06) 31px, rgba(44, 112, 153, 0.06) 32px);
}

.section--slant {
  clip-path: polygon(0 2.5%, 100% 0, 100% 97.5%, 0 100%);
  padding-block: calc(clamp(48px, 8vw, 96px) + 24px);
}

.section-head {
  display: grid;
  gap: 0.75rem;
  max-width: 56rem;
  margin-bottom: clamp(1.5rem, 4vw, 3rem);
}

.section-index,
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--coral-500);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.section-title {
  margin: 0;
  font-size: clamp(1.8rem, 4.5vw, 3.4rem);
  line-height: 1.04;
}

.section-deck {
  max-width: 34em;
  margin: 0;
  color: var(--slate);
  font-size: 1rem;
  line-height: 1.75;
}

.section--blue .section-deck {
  color: var(--ice);
}

.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.prose {
  max-width: 68ch;
}

.prose p,
.prose li {
  max-width: 38em;
  line-height: 1.75;
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
  list-style: revert;
}

.prose a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover {
  color: var(--coral-500);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.6rem 1rem;
  border: 1px solid transparent;
  font-size: 0.86rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  text-align: center;
  white-space: nowrap;
  transition:
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-solid {
  background: var(--coral-500);
  border-color: var(--coral-500);
  color: var(--blue-900);
}

.btn-solid:hover {
  background: var(--coral-200);
  border-color: var(--coral-200);
  color: var(--blue-900);
}

.btn-outline {
  background: transparent;
  border-color: var(--coral-500);
  color: var(--blue-900);
}

.btn-outline:hover {
  background: var(--coral-200);
  color: var(--blue-900);
}

.btn-compact {
  min-height: 40px;
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
}

.btn-block {
  width: 100%;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  color: var(--snow);
  background-color: var(--blue-900);
  background-image: repeating-linear-gradient(90deg, rgba(199, 213, 222, 0.07) 0, rgba(199, 213, 222, 0.07) 1px, transparent 1px, transparent 80px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: min(var(--wide-max), calc(100% - (var(--gutter) * 2)));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 44px;
  color: var(--snow);
  flex: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: var(--snow);
}

.brand-mark-svg {
  width: 34px;
  height: 34px;
  overflow: visible;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-name {
  color: currentColor;
  font-size: 1.125rem;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.brand-sub {
  margin-top: 4px;
  color: var(--coral-200);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  font-weight: 500;
  letter-spacing: 0.2em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1.6vw, 1.5rem);
  margin-left: auto;
  min-width: 0;
}

.site-nav {
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 1.4vw, 1.35rem);
}

.nav-item {
  flex: none;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 0.1rem;
  color: var(--snow);
  font-size: 0.81rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  opacity: 0.82;
  transition: color var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 5px;
  height: 2px;
  background: var(--coral-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}

.nav-link:hover {
  color: var(--coral-200);
  opacity: 1;
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--coral-500);
  opacity: 1;
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: none;
}

.site-header .btn-outline,
.site-footer .btn-outline {
  color: var(--snow);
}

.site-header .btn-outline:hover,
.site-footer .btn-outline:hover {
  background: var(--blue-700);
  border-color: var(--coral-200);
  color: var(--coral-200);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid transparent;
  color: var(--snow);
}

.nav-toggle:hover {
  border-color: var(--coral-500);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.site-header[data-open] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header[data-open] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  z-index: 2;
  height: 2px;
  background: var(--coral-500);
  transform: scaleX(0);
  transform-origin: left;
  pointer-events: none;
}

.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--blue-900);
  color: var(--snow);
  border-top: 1px solid var(--line);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.08;
  background-image:
    repeating-linear-gradient(45deg, transparent 0, transparent 15px, var(--coral-200) 15px, var(--coral-200) 16px),
    repeating-linear-gradient(-45deg, transparent 0, transparent 15px, var(--coral-200) 15px, var(--coral-200) 16px);
  background-size: 48px 48px;
}

.footer-inner {
  position: relative;
  z-index: 1;
  width: min(var(--wide-max), calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
  padding-top: clamp(40px, 7vw, 84px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr 1fr;
  border-top: 1px solid rgba(199, 213, 222, 0.28);
  border-bottom: 1px solid rgba(199, 213, 222, 0.28);
}

.footer-zone {
  min-width: 0;
  padding: clamp(22px, 3.5vw, 40px);
}

.footer-zone + .footer-zone {
  border-left: 1px solid rgba(199, 213, 222, 0.28);
}

.footer-brand {
  min-width: 0;
}

.footer-brand .brand {
  margin-bottom: 1rem;
}

.footer-line {
  max-width: 34ch;
  margin: 0;
  color: var(--ice);
  font-size: 0.94rem;
  line-height: 1.75;
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.footer-nav {
  min-width: 0;
}

.footer-heading {
  margin: 0 0 1rem;
  color: var(--coral-200);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1.4;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 0.45rem;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  width: max-content;
  max-width: 100%;
  min-height: 32px;
  color: var(--ice);
  font-size: 0.9rem;
  font-weight: 400;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-links a:hover {
  color: var(--coral-200);
  border-color: var(--coral-500);
}

.footer-contact {
  min-width: 0;
}

.footer-address {
  display: grid;
  gap: 0.7rem;
  margin: 0;
  color: var(--ice);
  font-size: 0.9rem;
  font-style: normal;
  line-height: 1.6;
}

.footer-address span {
  display: block;
  overflow-wrap: anywhere;
}

.footer-note {
  max-width: 34ch;
  margin: 1rem 0 0;
  color: var(--coral-200);
  font-size: 0.78rem;
  line-height: 1.65;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.15rem;
  color: var(--ice);
}

.footer-icp {
  margin: 0;
  color: var(--ice);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  opacity: 0.78;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.76rem;
}

.footer-legal a {
  color: var(--ice);
  opacity: 0.82;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), opacity var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-legal a:hover {
  color: var(--coral-200);
  opacity: 1;
  border-color: var(--coral-500);
}

.grid {
  display: grid;
  gap: clamp(1rem, 3vw, 2rem);
}

.grid-12 {
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.span-4 {
  grid-column: span 4;
}

.span-5 {
  grid-column: span 5;
}

.span-6 {
  grid-column: span 6;
}

.span-7 {
  grid-column: span 7;
}

.span-8 {
  grid-column: span 8;
}

.span-12 {
  grid-column: 1 / -1;
}

.breadcrumb {
  margin: 0 0 1.25rem;
  color: var(--slate);
  font-size: 0.76rem;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-inline: 0.25rem;
  color: var(--line);
}

.breadcrumb-item a {
  color: var(--slate);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.breadcrumb-item a:hover {
  color: var(--coral-500);
}

.breadcrumb-item[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--line);
  background: var(--snow);
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1;
}

.tag--coral {
  background: var(--coral-500);
  border-color: var(--coral-500);
  color: var(--blue-900);
}

.tag--red {
  background: transparent;
  border-color: var(--red-600);
  color: var(--red-600);
}

.tag--outline {
  background: transparent;
  border-color: var(--coral-500);
  color: var(--coral-500);
}

.index-list {
  display: grid;
  border-top: 1px solid var(--line);
}

.index-item {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  min-height: 64px;
  padding: 0.85rem 0;
  padding-left: 0;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.index-item:hover {
  background: var(--ice);
  border-left-color: var(--coral-500);
  transform: translateX(2px);
}

.index-num {
  color: var(--blue-400);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.index-item:hover .index-num {
  color: var(--coral-500);
}

.index-copy {
  min-width: 0;
}

.index-title {
  display: block;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
}

.index-meta {
  display: block;
  margin-top: 0.15rem;
  color: var(--slate);
  font-size: 0.78rem;
  line-height: 1.5;
}

.card {
  position: relative;
  min-width: 0;
  padding: clamp(18px, 3vw, 30px);
  background: var(--snow);
  border: 1px solid var(--line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--coral-500);
}

.card--accent {
  background: var(--coral-500);
  border-color: var(--coral-500);
  color: var(--blue-900);
}

.card--ice {
  background: var(--ice);
}

.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.card-body {
  min-width: 0;
}

.card-title {
  margin: 0;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  line-height: 1.15;
}

.card-meta {
  margin: 0;
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.card--accent .card-meta {
  color: var(--blue-700);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 32px;
  margin-top: 1rem;
  color: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  border-bottom: 1px solid currentColor;
}

.card-link:hover {
  color: var(--coral-500);
}

.card--accent .card-link:hover {
  color: var(--blue-700);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.stat {
  padding: 1rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.stat-value {
  display: block;
  color: var(--coral-500);
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 500;
  line-height: 1;
}

.stat-label {
  display: block;
  margin-top: 0.5rem;
  color: var(--slate);
  font-size: 0.75rem;
  line-height: 1.4;
}

.step-list {
  display: grid;
  border-top: 1px solid var(--line);
}

.step {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.step-num {
  color: var(--coral-500);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
}

.step-body {
  min-width: 0;
}

.timeline {
  position: relative;
  display: grid;
  gap: 0;
  margin-left: 0.5rem;
  padding-left: 1.25rem;
  border-left: 1px solid var(--line);
}

.timeline-item {
  position: relative;
  padding: 0 0 1.75rem;
}

.timeline-marker {
  position: absolute;
  top: 0.45rem;
  left: calc(-1.25rem - 4px);
  width: 7px;
  height: 7px;
  background: var(--coral-500);
  transform: rotate(45deg);
}

.timeline-body {
  min-width: 0;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  padding: 0.75rem 0.6rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  color: var(--slate);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.data-table tbody tr:nth-child(even) {
  background: var(--ice);
}

.media {
  position: relative;
  margin: 0;
}

.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ice);
}

.media-ratio {
  position: relative;
  aspect-ratio: 16 / 9;
  background-color: var(--ice);
  background-image: repeating-linear-gradient(45deg, transparent 0, transparent 11px, rgba(44, 112, 153, 0.08) 11px, rgba(44, 112, 153, 0.08) 12px);
}

.media-ratio--wide {
  aspect-ratio: 21 / 9;
}

.media-ratio--portrait {
  aspect-ratio: 3 / 4;
}

.media-frame img,
.media-ratio img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-caption {
  margin-top: 0.55rem;
  color: var(--slate);
  font-size: 0.76rem;
  line-height: 1.5;
}

.tabs {
  min-width: 0;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 1px solid var(--line);
}

.tab {
  min-height: 44px;
  padding: 0.65rem 1rem;
  border-bottom: 2px solid transparent;
  color: var(--slate);
  font-size: 0.85rem;
  font-weight: 700;
}

.tab:hover {
  color: var(--coral-500);
}

.tab[aria-selected="true"] {
  color: var(--ink);
  border-bottom-color: var(--coral-500);
}

.tab-panel {
  padding-top: 1.5rem;
}

.section-index a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: inherit;
  border-bottom: 1px solid transparent;
}

.section-index a:hover {
  color: var(--coral-500);
}

[data-section-link].is-active {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (max-width: 1120px) {
  .header-inner {
    gap: 1rem;
  }

  .nav-list {
    gap: 0.75rem;
  }

  .nav-link {
    font-size: 0.76rem;
  }

  .header-actions .btn-compact {
    padding-inline: 0.6rem;
    font-size: 0.7rem;
  }
}

@media (max-width: 980px) {
  .header-inner {
    width: calc(100% - 24px);
    gap: 0.75rem;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 99;
    display: none;
    max-height: calc(100vh - var(--header-h));
    overflow: auto;
    padding: 0 var(--gutter);
    background-color: var(--blue-900);
    background-image: repeating-linear-gradient(90deg, rgba(199, 213, 222, 0.07) 0, rgba(199, 213, 222, 0.07) 1px, transparent 1px, transparent 80px);
    border-bottom: 1px solid var(--line);
  }

  .site-header[data-open] .site-nav {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: 0.5rem;
  }

  .nav-item {
    border-bottom: 1px solid rgba(199, 213, 222, 0.18);
  }

  .nav-item:last-child {
    border-bottom: 0;
  }

  .nav-link {
    width: 100%;
    justify-content: space-between;
    padding: 0.95rem 0;
    font-size: 1rem;
    opacity: 1;
  }

  .nav-link::after {
    bottom: 0;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .header-actions {
    gap: 0.4rem;
  }

  .btn-compact {
    min-height: 44px;
  }

  .grid-12 {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .span-4,
  .span-5,
  .span-6 {
    grid-column: span 3;
  }

  .span-7,
  .span-8,
  .span-12 {
    grid-column: 1 / -1;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-zone + .footer-zone {
    border-left: 0;
    border-top: 1px solid rgba(199, 213, 222, 0.28);
  }
}

@media (max-width: 680px) {
  body {
    font-size: 16px;
  }

  h1 {
    font-size: clamp(1.8rem, 8vw, 2.6rem);
    line-height: 1.15;
  }

  h2 {
    font-size: clamp(1.5rem, 6vw, 2.2rem);
    line-height: 1.15;
  }

  .header-inner {
    gap: 0.5rem;
  }

  .brand-mark,
  .brand-mark-svg {
    width: 28px;
    height: 28px;
  }

  .brand-name {
    font-size: 1rem;
  }

  .brand-sub {
    display: none;
  }

  .header-actions {
    gap: 0.35rem;
  }

  .header-actions .btn {
    padding-inline: 0.55rem;
    font-size: 0.6875rem;
  }

  .grid-12 {
    grid-template-columns: 1fr;
  }

  .span-4,
  .span-5,
  .span-6,
  .span-7,
  .span-8,
  .span-12 {
    grid-column: 1 / -1;
  }

  .index-item {
    grid-template-columns: 2.6rem minmax(0, 1fr);
  }

  .index-item .tag {
    grid-column: 2;
    justify-self: start;
  }

  .section--slant {
    clip-path: polygon(0 1.2%, 100% 0, 100% 98.8%, 0 100%);
  }

  .footer-inner {
    width: calc(100% - 32px);
  }

  .footer-zone {
    padding: 22px 0;
  }

  .footer-grid {
    border-top: 0;
  }

  .footer-bottom {
    padding-block: 1rem;
  }

  .footer-legal {
    gap: 0.75rem;
  }
}

@media (max-width: 380px) {
  .header-actions .btn {
    padding-inline: 0.45rem;
    font-size: 0.65rem;
  }

  .brand-mark,
  .brand-mark-svg {
    width: 24px;
    height: 24px;
  }

  .brand-name {
    font-size: 0.95rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}